Just some 3D stuff
Source:
November 27, 2005
cordination chemistryweins displacement law
Problem Statement
A convex polyhedron has 26 vertices, 60 edges, and 36 faces, 24 of which are triangular, and 12 of which are quadrilaterals. A space diagonal is a line segment connecting two non-adjacent vertices that do not belong to the same face. How many space diagonals does have?